so hopefully he'll have enough time to explain it and explain how they're not going to explode the deficits and put a big new burden on the middle class. >> we see a number of battleground stake polls out this morning including those by cbs news and "the new york times" that show a tightening of the contest in several of these states. can joe biden tonight stop the slide in the polls for president obama? >> well, nora, i don't think there's a slide in the polls. i think there was a bump after the debate. i think it was mostly last weekend. as you know, these polls that you conducted don't measure the days since the debate, they measure what happened from before the debate to after. so i don't think there's big momentum. there's no doubt that governor romney collected a couple of points, mostly of republican leaning independents as a result of the last debate. what i think the vice president can do is really drive home the fact that one candidate, the president, has a vision that has squarely in it the interest of the middle class and the notion that you build the economy through the middle